baber/WOPTO huggingface dataset:
Patent GB-685798-A (GB)
Title: Improvements in or relating to a circuit arrangement for automatic frequency adjustment in receiving installations for frequency-keyed telegraphy transmitters
IPC: H04L27/10
Filed: 1950-10-02
Abstract: 685,798. Frequency-shift telegraphy; generating oscillations. SIEMENS & HALSKE AKT.- GES. Oct. 2, 1950 [May 13, 1949; Oct. 1, 1949], No. 24072/50. Class 40 (v). [Also in Group XXXV] In a receiver for frequency-shift telegraph signals, both the mark frequency and the space frequency are employed for effecting automatic tuning or frequency adjustment. As shown in Fig. 1, the incoming signals ZF after preliminary conversion stages are passed through a filter Fs to a further conversion stage M1 at which they are mixed with oscillations generated by a source G1 to produce audio output tones corresponding respectively to mark and space signals. The signals ZF are also passed to a mixer M2 to which are also fed audio oscillations from sources G2, G<SP>1</SP>2 of the desired audio tones, which are preferably in harmonic relation. The common difference frequency is selected by a sharp filter StF and is fed to a device Ph which compares its phase with that of the source G1 in order to provide a regulating voltage FN. This is applied to the oscillator of a preliminary converter stage, thereby adjusting the intermediate frequencies ZF until the output of mixer M2 is in synchronism with the source G1. In order that the receiver may co-operate with transmitters employing different values of frequency shift, the sources G2, G<SP>1</SP>2 may be replaced by a modulating arrangement, Fig. 3, in which two superposed oscillations of frequencies f1, f2 are modulated at M by a variable frequency f3. From the output are selected the frequencies f1+ f3 and f2 - f3 which vary in opposite directions symmetrically about the mean of f1 and f2 as f3 is varied. f2 may advantageously be made equal to 2f1 and the upper limit of f3 less than f1. In an alternative arrangement, Fig. 6, the variable frequency ft modulates in a balanced modulator a frequency 2f0, where f0 is the mean frequency of the two desired outputs. In this way, ft provides one of the desired outputs directly, and the other is constituted by the lower side-frequency 2f0-ft, so that the desired two outputs vary in opposite directions about a mean frequency f0. Any error in the frequency shift of the transmitter may be determined by first switching off the generator G<SP>1</SP>2 and allowing G2 to operate alone until there is no correcting voltage in the regulating lead FN. The generator G<SP>1</SP>2 is then allowed to operate alone, and its frequency is varied until the regulating voltage is again zero. The amount of frequency adjustment of the generator G<SP>1</SP>2 is a measure of the error in the frequency shift.
Patent GB-1340355-A (GB)
Title: Method and apparatus for making a bore hole in the ground
IPC: E02D5/52
Filed: 1971-04-19
Abstract: 1340355 Boring earth and rock piling INTERNATIONAAL TECHNISCHE HANDELSONDERNEMING EN ADVIES BUREAU NV 19 April 1971 [13 March 1970] 24080/71 Headings E1F and E1H In a method of making a borehole in the ground and lining the wall of the bore with a prefabricated sleeve, an annulus 6 (whose shape is defined in the specification) is driven into the ground by a tube 1 having a striking head 3 at the end opposite the annulus, and cuts a hole for a sleeve 2 surrounding the tube, a resilient member 5 being interposed between the sleeve and a part 3 of the tube to which the driving force is applied and the tube 1 is subsequently withdrawn leaving the borehole lined with the sleeve 2. The sleeve may be fixed to the flange. The sleeve may be of weak construction and may be made of iron, non-ferrous metal, plastics or ceramic material, and may be of round, oval, square, rectangular or star-shaped cross section. In a modification, Fig. 4, a stepped hole may be made using telescopic tubes and sleeves. After the tube 1 has been withdrawn leaving the sleeve and annulus 6 in position, a narrower tube (not shown) surrounded by a sleeve 8, and acting on a further annulus 11 is driven down through the annulus 6 by applying a force to the tube through a lengthening piece (not shown) coupled to the tube. The tube is withdrawn, and the process repeated as required, to position further sleeves such as 12. The process may be used for making vertical holes for the formation of in situ piles, or horizontal holes through dykes for cable laying.
Patent GB-1499713-A (GB)
Title: Grinding machine
IPC: B24B27/04
Filed: 1976-06-10
Abstract: 1499713 Grinding CENTRO-MASKIN GOTEBORG AB 10 June 1976 [10 June 1975] 24091/76 Heading B3D A grinding machine comprises a frame structure 1a, 1b, means 17 for supporting and moving a workpiece rectilinearly, a carriage 2 supporting a grinding stand 3 provided on the upper portion of the structure, the stand being rotatable in the horizontal plane on the carriage and carrying a grinding arm 9 having a grinding wheel driven through an intermediate shaft 8 fastened to the stand, by a motor 6 fixed to the stand. The frame structure consists of beams 1b which are supported by columns la and support rails 23 along which the carriage is movable in steps. The carriage supports the grinding stand which is adjustable about a vertical pivot located above the centre of the grinding spindle and has wheels 24, 26 resting on rails 25a, 25b on the carriage, adjustment about the pivot being effected preferably by an hydraulic cylinder and the stand being lockable in its adjusted position by clamping members on the stand engaging the rails. Similar clamping members lock the carriage on the rails 23 after its movement in stages. The motor 6 is disposed on a cradle 20 articulated to an axle 21 on the stand 3. The interemdiate shaft 8 supports the grinding arm 9 and a belt pulley and the grinding wheel 10 is driven from the motor 6 by belts 27a, 27b. A pressure cylinder 12 acts on the pendulum to control and adjust the pressure of the wheel on the workpiece. An electrical system records the current consumption of the motor and actuates the valves of the cylinder 12 to maintain the grinding pressure constant. The diameter of the wheel may be scanned and the motor speed increased as the wheel is worn to compensate for wear. The workpiece is supported on a table 17 movable along guide rails by a drive 16 having a motor driving a wire guided over pulleys 14. Braking is effected at the ends of the to-and-fro movement of the table to provide a rapid and soft reversing movement. An intermediate piece 28 is rotatable on an axle concentric with the intermediate shaft 8 and the arm is adjustable about a pivot 29 on the piece 28 by a screw 30 and nut 31 arrangement for adjusting the tension of the belt. The edges of the workpiece may be ground by a wheel 18.
Patent GB-704279-A (GB)
Title: Improvements in and relating to waterproof concrete structures
IPC: E02B3/16
Filed: 1951-10-16
Abstract: 704,279. Waterproof courses. WILLIAMS, Sir E. O. Oct. 15, 1952 [Oct. 16, 1951], No. 24142/51. Class 20 (4). [Also in Group XXI] A waterproof course for concrete structures is made by forming a ply structure of three layers B, C, D, or more, of thin concrete slabs, intervening thinner layers G of waterproof plastic material, e.g. bituminous material, being sandwiched between the slabs which are staggered to avoid coincidence of their junctions. The slabs are preferably reinforced. Fig. 3 shows a construction for a sub-way in which a layer of porous concrete A, finished with a smooth upper layer E of cement mortar and a thin layer of bituminous plastic material F, is laid before the ply structure, a final layer K of bituminous plastic being laid on top of the upper layer D. More concrete, or grouted gravel fill, can then be laid on top of the ply structure, a further ply structure being added if necessary. In applying the invention to waterproofing dams &c., the ply structure preferably forms the outer surface only of the main mass of concrete. The slabs may be rebated to increase the resistance to penetration of moisture at the joints between the slabs.
Patent GB-355494-A (GB)
Title: Improvements in or relating to fishing reels
IPC: A01K89/015
Filed: 1930-08-12
Abstract: 355,494. Fishing reels. H A R D Y BROS. (ALNWICK), Ltd. and HARDY, L. R., Alnwick, Northumberland. Aug. 12, 1930, No. 24169. [Class 48.] The brake on the line spool of a fishing reel is released when the check action is engaged by an extension 9 on the checklever h engaging a depression 10 in the brakelever s. The spring tension on the brake lever s is adjusted by a screw adjustment 2 and a stud is provided by means of which the spool is inserted in the reel casing. The outer flange of the spool overhangs the reel frame.
Patent GB-476904-A (GB)
Title: Improvements relating to vats
IPC: C25D17/02
Filed: 1936-09-04
Abstract: 476,904. Vats. CANNING & CO., Ltd., W., and POPE, G. A. Sept. 4, 1936, Nos. 24198/36 and 4168/37. [Class 69 (i)] A vat is constructed of superposed planks or boards a with metal reinforcing bars b having a flat portion between the adjacent edges of the planks and an integral projection or projections extending laterally from the flat portion and providing lateral support for one or both of the adjacent planks, together with securing bolts c extending through the planks and bars. In the construction shown, the bars b are of H- section, the web being interposed between the planks and the flanges forming the lateral supports for them, one flange lying in recesses so as to be flush with the outer face of the planks and the other being received in grooves in their edges. Constructions employing bars of T, L, cruciform, and bulbousedged sections are also shown. In the first case the vertical flanges are recessed into the outer faces of both adjacent planks, and in the second case the vertical flange is recessed into the outer face of one of the adjacent planks. The vertical flanges of the cruciform section, and the bulbous edge of the other section are received in grooves in the edges of the planks. A sheet-lead lining d may be provided. Specification 450,555 is referred to.
Patent GB-1286345-A (GB)
Title: Non-woven plexifilament sheets
IPC: D04H3/16
Filed: 1970-05-19
Abstract: 1286345 Perforated, spot-bonded plexifilament sheets E I DU PONT DE NEMOURS & CO 19 May 1970 [8 July 1969] 24263/70 Heading D1R A porous, non-woven film-fibril sheet of random-laid, substantially continuous linear polyethylene or other crystalline polyolefine plexifilaments (see Specification 891943) is spot bonded by passing the sheet between the nip of two rolls. One has a heat-conducting surface carrying 200-800 hard bosses per 1 in 2, and comprising 5-10% of said area, the other has a resilient surface. A temperature of 150-185C ensures that the bonds extend for the thickness of the sheet. Multiple passes may be made. The sheet is then perforated by one or more passes through a needling loom or rotary pin perforator. Said perforations have an average cross-sectional area of 10<SP>-4</SP> sq. in. to 10<SP>-5</SP> sq. in. and comprise 3% to 10% of the sheet area. The needles or pins are of circular or triangular cross-section, and are barbless, so that the perforations are mainly produced by separating the plexifilaments rather than by tearing them. The sheet is formed by spreading the extruded plexifilaments using a contoured rotating baffle, passing them through a corona charging zone and collecting them on a moving belt in overlapping intersecting layers. The sheet is consolidated by calendering.
Patent GB-615291-A (GB)
Title: Improvements in and relating to writing machines
IPC: B41J3/26
Filed: 1946-08-15
Abstract: 615,291. Typewriters &c. PALANQUE, C. C. M., and NUNN, G. W. Aug. 15, 1946, No. 24310. [Class 100(iv)] Type-lever machines; stenographic machines; type-lever actions.-In a shorthand typewriter or stenographic machine having type levers 3 striking a platen 9 and operated by key levers 15, the type levers 3, spaced e.g. by discs 6, are pivotally mounted on a bar 4 rigidly secured between the side frames of a cradle 5 mounted in the machine frame each lever having a heel 7 engaged by the key lever and a toe 8 acted on by a hair-pin spring 10. The tension of the springs 10 acting on the toe parts 8 is adjustable by screws 16 pivoting a lockable combed bar 14 engaging the springs.
Patent GB-627706-A (GB)
Title: Improvements in or relating to gas filters
IPC: B01D46/30
Filed: 1946-08-16
Abstract: 627,706. Gas filters. BABCOCK & WILCOX, Ltd. Aug. 16, 1946, No. 24420. Convention date, July 3, 1941. [Class 8(ii)] A gas filter comprises a vessel 2, Fig. 2, enclosing tiers of trays 59 supporting granular filtering material on surfaces so inclined that the granules tend to flow downwardly, and having at least one duct 61 with an open lower end and sides serving to dam the granules at the upper surface of the layer thereof so that the gas to be filtered penetrates the subjacent layer in order to flow between the space within and a space outside the duct, and means for controlling discharge of fouled granules from, and the flow of fresh granules to the trays. In operation hot dust-laden gas entering at 57 passes up ducts 64 connecting annular chambers 62 of each tier and then traverses conduits 63 and passes down each of a plurality of the ducts 61 to escape from the sand embedded bases thereof, and thereafter passes down ducts 67 which lead to a cleaned gas outlet 58. Hot contaminated sand is released from the trays 59 by opening sleeve valves 74, 74<SP>1</SP>, 74<SP>11</SP> in turn by a rod 71, and is thereafter discharged from a hopper 65 to a water jacketed chamber 90, Fig. 1, and past a pneumatic valve 92 to a drum 93 from which the now cooled sand is removed through a door 94. Fresh sand is introduced during the filtering operation through an inlet 76 by means of a hopper 79, a collector 80, past a pneumatic valve 86 and through an air-tight container 82 having a pivoted hopper provided with a balance 81. Specification 627,705, [Group XII], is referred to.
Patent GB-360980-A (GB)
Title: Improvements relating to the production of metal castings
IPC: B22D27/04
Filed: 1930-08-15
Abstract: 360,980. Casting-machines. RAILEY, R. W., 23, Stockport Road, Altrincham, Cheshire. Aug. 15, 1930, No. 24523. [Class 83 (i).] Casting processes ; moulds.-In order to apply external pressure to a steel ingot or other casting 2 as it shrinks on cooling or to vary the rate of cooling or both, lead or other metal a of low melting- point is introduced into the space between the casting 2 and its mould 1 during or after pouring. The level of the metal a in the mould may be varied, as desired, by means of a reservoir 4, controlled by valves 7, 12, and a draw-off device 21 or by a reservoir lower than the mould which can be subjected to any desired pressure by a piston, gas, &c. or in which the liquid level can be varied as by immersing a weight. The level of the metal a in the mould may be observed by means of an alarm or indicator 20 which can be put in operation by opening a valve 15. The pipes 6, 13 and valves 7, 15 must be kept hot as by means of gas jets. The mould may be heated or cooled. by giving it a ribbed formation 52, Fig. 5, and applying an adjustable muff 53 through which air &c. is passed. The upper part 59 of the mould may be lined with refractory material and, if desired, made with double walls for use as a heating chamber.
Patent GB-319893-A (GB)
Title: Improvements in obtaining granular solids
IPC: B01J2/04
Filed: 1928-08-27
Abstract: 319,893. Collier, A. J., Heywood, F., and Imperial Chemical Industries, Ltd. Aug. 27, 1928. Granulating. - Granular solids are obtained from molten or liquid materials, for instance calcium or ammonium nitrate or a mixture of ammonium nitrate and calcium carbonate, bv collecting the material on a plurality of rods or spikes arranged on a rotary member and kicking it off into a cooling chamber in which it is solidified while in contact with gas only. When solutions are under treatment water may be removed by passing warm air &c. through the cooling chamber. The material may be collected from a pool, or as shown, molten material supplied to an inclined steam-jacketed trough 2 from a hopper 1 through a valve 3 may be collected by a rotary brush 6 the spikes of which are deflected slightly on contacting with the trough, and the material flicked into a cooling chamber 8 up which is passed a current of cold air. Large or small granules may be obtained by varying the shape and thickness of the spikes &c. According to the Provisional Specification, the rotary member for collecting the material may be fitted with projections as opposed to rods or spikes.
Patent GB-994963-A (GB)
Title: Improvements in or relating to advancing mine roof supports
Inventor: RASON WILLIAM
IPC: E21D17/06
Filed: 1960-07-14
Abstract: 994,963. Advancing mine roof supports. COAL INDUSTRY (PATENTS) Ltd. Sept. 29, 1961 [July 14, 1960], No. 24584/60. Heading E1E. An advancing mine roof support for ripping lips comprises two roof bars 1, 2 supported by props 4, 3 respectively which are relatively advanced by winches or a pivoted ram 7 restrained by resilient bushes 11, 12. Each bar may be carried by two props and two chocks arranged alternately along the length of the bar, the rams 7 being attached to the chocks.
Patent GB-1447829-A (GB)
Title: Filter with integral housing
IPC: B01D46/52
Filed: 1974-06-04
Abstract: 1447829 Filter with integral housing DONALDSON CO INC 4 June 1974 [2 July 1973 24591/74 Heading BIT A filter comprises a housing formed from two oppositely disposed channel shaped members 12 and 13, having an inlet and outlet 15 and 16, respectively, the sides of one member 13a overlapping the sides of another member 12a. The ends of a pleated filter element 25, are trapped together with strip seals 30, e.g. of polyurethane foam or silicone, between the overlaps. The edges of other pleat folds are spaced apart by stabiliser member 28. End plates 20 and 21 with adhesive 34 (e.g. heat setting thermoplastic or solvent type) seal zig zag ends of pleats. The end plates also retain members 12 and 13 together. The filter may be of pleated paper, felt or plastics foam. The sides i.e. 12a or 13a on each housing member may be of unequal length.
Patent GB-352778-A (GB)
Title: Improvements in variable-speed transmission mechanism
IPC: F16H15/50
Filed: 1930-08-16
Abstract: 352,778. Friction gearing. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, 13D, Emmasingel, Eindhoven, Holland. Aug. 16, 1930, No. 24603. Convention date, Sept. 25, 1929. [Classes 80 (i) and 80 (ii).] Friction gearing comprises planetary balls or like members 25, Fig. 4, which engage friction surfaces 16, 26, 27, one of which, 26, is not a surface of revolution. The surface 26 is called the clamping surface, and the ball spins upon it at the point of contact B. The ball 25 rolls on driving surface 27 at C, and on fixed surface 16 at A, and becomes squeezed so that the engaging pressures are proportional to the load. In a form shown in Figs. 2 and 3, surface 27 is carried by driving shaft 10. The clamping surfaces 26, one for each ball, are arranged on a pyramid fast on the driven shaft 13. The surface 16 is flotably supported on rods 17, which pass through a fixed frame 20, so that surface 16 does not rotate, but equalizes the load on the balls 25, which are preferably supported in a loose cage, not shown. The speed ratio of the gearing is varied by turning a control head 22 which screws at 21 into a spider 18 secured to the rods 17. A form with a control spring is described, which varies automatically. A form is described in which the clamping surfaces are the edges of obliquely-supported antifriction rollers. A form which varies automatically in both directions of drive is shown in Fig. 26. The clamping surfaces take the form of radial V slots 63 in a loose disc 41 connected to a clutch member 57 and to a brake member 51. The driving surface 42 with which the balls 40 also engage is splined on driving shaft 45, and automatic control is provided by spring 47. The third gear surface is a cone 43 connected to a disc 53, which has a ball-bearing 54 between itself and disc 41. To drive in either direction from neutral position shown, control brake disc 50 is moved to right or left. In the former case, cone 43 is braked and disc 41 is clutched at 57, 55 to driven shaft 44. In the latter case, discs 51, 41 are braked, and cone 43 is clutched at 56, 55 to driven shaft 44.
Patent GB-534534-A (GB)
Title: A process for the bleaching and utilization of waste sulphite liquors
IPC: D21C11/00
Filed: 1939-08-26
Abstract: 534,534. Utilizing waste sulphite liquors. BELLAK, R., and BELLAK, W. Aug. 26, 1939, No. 24618. [Classes 2 (ii) and 15 (ii)] [Also in Groups III and V] A sizing, emulsifying, or wetting' agent is prepared from waste sulphite lye by alkalizing it with soda, quick lime or ammonium carbonate, precipitating any transformable calcium by sodium or ammonium carbonate, filtering, and treating the filtrate with a bleaching agent such as hydrogen peroxide. The bleached product may be evaporated and reduced to a dry powder.
Patent GB-1015481-A (GB)
Title: A device for producing electro-magnetic oscillations of very high frequency
IPC: H01J25/00
Filed: 1962-06-27
Abstract: 1,015,481. Plasma devices. MAX-PLANCKGESELLSCHAFT ZUR FORDERUNG DER WISSENSHAFTEN E.V. June 27, 1962 [June 29, 1961; Sept. 15, 1961; Nov. 21, 1961], No. 24662/62. Heading H1D. A device for generating electromagnetic oscillations of very high frequency comprises an arrangement for producing a cold low-pressure plasma, i.e. a plasma in which the temperature of the neutral gases and of the ions is of the order of magnitude as room temperature and the pressure is below 1 Torr., an arrangement setting up a magnetic field H in the plasma, and an output coupler 9 to withdraw high-frequency energy in the form of harmonics of the electroncyclotron frequency from the plasma. The plasma may be produced by a Penning discharge, the positive column of a direct-current lowpressure discharge, linear or circular high-frequency electrodeless discharges or by nuclear radiation, e.g. #-rays. It is stated that the harmonics of the electron-cyclotron frequency have comparatively high energy in those cases where the index of refraction of the plasma is so high that the circumference of the circular or spiral path of the electrons is of the order of the wavelength of the electron-cyclotron frequency. As shown in Fig. 1, a Penning discharge is maintained between electrodes 2, 3, and horn aerials 9 withdraw the output energy to a utilization device 10. In the embodiment of Fig. 6 (not shown), additional electrons are injected into the plasma in the form of a ribbon-shaped beam 26, and the intensity of the harmonics increased by modulating the density of the injected electrons in the beam at the electron-cyclotron frequency, the density modulation being effected by a velocity modulation like that that takes place in a klystron oscillator. The density modulation may be produced by providing an electrode in the form of a diaphragm or grid, or a cavity resonator fed from a klystron or magnetron.
Patent GB-422407-A (GB)
Title: Improvements relating to check valves and the like
IPC: F16K15/02
Filed: 1934-08-28
Abstract: 422,407. Fluid - actuated valves. WAYNE TANK & PUMP CO., Ltd., 42, Newlands Park, Sydenham, London.-(Jauch, R. J. ; North Anthony Boulevard, Fort Wayne, Indiana, U.S.A.) Aug. 28, 1934, No. 24791. [Class 135] A check valve 5 is carried by a diaphragm 6 clamped in position across a chamber 3 by a chambered cap 7, passages 8, 12, 10, 11 putting the upper surface of the diaphragm into communication with the chamber 3. The valve is shown applied to a compressed air tank 17, the valve opening when the pressure in the supply pipe 16 acting on the valve 5 overcomes the differential effect on the diaphragm of the pressure in the chamber 3. The lower surface of the cap 7 is curved to support the diaphragm when the valve is open. The cap is closed by a plug 15 or a pressure gauge may be fitted at this point.